public class demo10 {
    private static boolean isRunning=true;
    public static void main(String[] args) {
//        boolean isRunning = true;
        Thread t = new Thread(()->{
            while (isRunning){
                System.out.println("hello thread");
                try {
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
            System.out.println("t线程已经结束");
        });
        t.start();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        System.out.println("控制t线程结束");
        isRunning=false;
    }
}
